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Problems with your car? On this page you can look a chart of problems and symptons and we will give you a list of simple and quick recommendations for the problems that you have. If you require a more detailed answer or you have a problem that does not exist on this page, please go to the technical support page and submit your problem and our technical staff will reply to your questions as soon as they can.

• Engines (Petrol, Diesel and LPG)
• Automatic Transmission
• Power Steering Systems
• Cooling Systems
• Greasing Application
• Assembly Lube and Anti-Seize
• Brake Fluid
  
• Gearbox and Differentials
• Fuel Systems - Diesel
• Fuel Systems - Petrol (incl. two-stroke)

Engines (Petrol, Diesel and LPG)	To Top
Symptom or Application	Recommendation
Noisy valve lifters	Change oil and filter and add Nulon Lifter-Free and Tune-Up (Part No. LFTU)
Exhaust smoke on start-up (blue / grey colour)	Usually caused by hardened and worn valve stem seals. Treat with Nulon ESL
If smoke is excessive	Use Nulon SS500 in petrol and diesel engines (SS500 can be combined with HP or E10)
Glazed bores in diesel engines	Treat with Nulon HP at double the recommended treatment
Dirty oil and sludge formation inside the rocker cover	Flush with Nulon EOF and change oil and filter (consider changing the oil more frequently)
General mechanical engine noise, e.g. bearings, pistons, timing chain, gudgeon pins etc.	Diesel engines - treat with HP Petrol engines - treat with E10
If noise is excessive	Use SS500 in diesel and petrol engines
Engine detonates (pings) particularly under load Note: All of the recommendations at right are based on the assumption that the engine is tuned correctly and within manufacturer's specifications.	Petrol engines using ULP fuel - treat with Nulon OBC. If problem persists after consuming the treated fuel then use Nulon PSO High Performance and modified petrol engines that require higher than 95 RON PULP - use Nulon PSO regularly For older vehicles using leaded fuel, use PSO on a regular basis. It may be advisable to retard the initial ignition timing slightly as the original timing specifications set for vehicles designed for 97 RON leaded fuel are no longer valid
Black or dark brown exhaust smoke	Refer to fuel "systems"
High performance or modified petrol engines, LP gas and rotary engines	Use Nulon E20 with each oil change for maximum protection against wear
Petrol engines in sound / good condition and used for typical day-to-day driving	Use Nulon E30 Long Term Engine Treatment for cost effective wear protection
Worn petrol engine protection	Use Nulon E10 each oil change
Diesel engine protection	Use Nulon HP in all diesel engines regardless of age or condition unless the engine suffers from a symptom found elsewhere in this chart

Automatic Transmission	To Top
Symptom or Application	Recommendation
Poor or harsh changing of gears	Use Nulon G60
Minor leaks	Use Nulon G60

Power Steering Systems	To Top
Symptom or Application	Recommendation
Vibration felt through steering wheel	Use Nulon G65
Fluid leak from pump, steering box or rack	Use Nulon G65

Cooling Systems	To Top
Symptom or Application	Recommendation
Corrosion protection (including rust)	Follow manufacturer's recommendations: If manufacturer specifies a quality corrosion inhibitor, use Nulon R45 If manufacturer recommends Anti-Freeze/Anti-Boil, then use one of Nulon's quality Long Life coolants in accordance with the directions
If vehicle is to be operated in sub-zero temperatures	Use one of Nulon's Long Life Coolants in accordance with the directions
Engine overheats	If a cooling system is in good operating condition it should not overheat. The only course of action is to have the cause diagnosed and rectified
Cooling system is contaminated or dirty	Use Nulon R40. Use as recommended when coolant is changed
Leaks	Leaks anywhere in a cooling system (except for hoses) should be treated with Nulon R50. Obviously it will not be effective on severe leaks. Remember that R50 is a temporary repair only to be used in emergencies

Greasing Application	To Top
Symptom or Application	Recommendation
For all general greasing applications, particularly where water resistance, high film strength and wide temperature range are required. Use where other greases fail	Nulon L80 Multi Purpose Grease with PTFE

Assembly Lube and Anti-Seize	To Top
Symptom or Application	Recommendation
For assembly of all mechanical components where start-up damage is of concern. For lubrication of components that will only ever be lubricated on initial assembly. For anti-seize protection of components exposed to weather or water	Nulon L90 Multi Purpose Grease with PTFE

Brake Fluid	To Top
Symptom or Application	Recommendation
Cleaning of all brake components	Nulon BRAKE400
Brake fluid where high temperature protection and DOT 4 performance levels are required	Nulon XBF Extreme Performance Brake Fluid

Gearbox and Differentials	To Top
Symptom or Application	Recommendation
Protection of all gearboxes (helical, spur or worm drive) and differentials whether automotive, trucking, marine or industrial. (Does not include automatic transmissions)	Use Nulon G70. This product has been proven to reduce wear by at least 50% in numerous tests
Difficult to change gears	Use Nulon G70. (Note: It is important to use the correct viscosity gear oil as specified by the manufacturer. Using something different can dramatically affect the quality of gear changes)
Difficult to change gears on cold mornings	Use Nulon G70
Gear noise (gearbox or differential)	Use Nulon G70
Bearing noise (gearbox or differential)	Use Nulon G70
Oil seal leaks in either gearbox or differential	Use Nulon ESL at 60ml per litre of oil

Fuel Systems - Diesel	To Top
Symptom or Application	Recommendation
Black exhaust smoke which is caused by over fuelling	Use Nulon DIC. If smoke is not reduced after treating two full tanks it will be necessary to have the pump and/or the injectors serviced
Waxing (in cold climates). Usually this problem is experienced when there is an unexpected cold snap at the beginning of winter and engines are still being run on summer grade fuel. This problem can be overcome by adding heating oil to the diesel or petrol at 10%	Use Nulon DIC which will assist in maintaining the integrity of the fuel
Fuel system corrosion	Use Nulon DIC which contains very effective corrosion inhibitors
Fuel system protection	Use Nulon DIC on a regular basis to maintain entire fuel system
Fuel consumption	Using Nulon DIC on a regular basis will preserve the efficiency of the entire system. In most instances the cost of DIC will be offset by fuel savings
Algae in fuel	Algae is identified as a stringy, sticky, black substance. It is usually first detected when it blocks the fuel filter. Algae only exists when there is water in the system. There is no simple treatment and professional assistance should be sought. Call Nulon's technical department for advice on freecall 1800 679 922.

Fuel Systems - Petrol (incl. two-stroke)	To Top
Symptom or Application	Recommendation
Engine is difficult to start Engine hesitates on initial acceleration Engine blows black exhaust smoke after starting Fuel consumption is progressively becoming worse Engine idles roughly	Use Nulon PIC, or TFSC on a regular basis
Fuel injected engine has sticky accelerator	Use Nulon CARB400 - Carburettor and Throttle Body Cleaner to clean the throttle body
Carburettor has visible carbon deposits in its throat	Use Nulon CARB400 - Carburettor and Throttle Body Cleaner to thoroughly clean the carburettor
Engine pinging or detonation	Refer to Engines